. >> tsarnaev is being questioned without being given his miranda rights as a matter of public tors are looking overseas for answers specifically want to know more about the older tsarnaev, the brother, who recently went to russia and how that might have changed him. abc reporter is in dagestan where the family has roots. >> reporter: last year, tamerlan tsarnaev traveled here to his old home in a region home to an islamist uprising. investigators want to learn if it was during that trip he became radicalized. family who saw him then, told us they saw no signs of extremism. there was no feeling that he could be, his aunt said, it's not possible. she showed us photos of the suspects as young boys. they were very kind boys, she says. tamerlan came here to renew his passport. the aunt says he stayed to train as a boxer. she said he prayed at the mosque on fridays but denied they fought over religion. we would debate with him. but not fighting. tamerlan spent six months and visited chechnya three times to visit family and also choosing to fly home from the chechen capital. younger brother,